These
first two images were taken in May 2010 and show the initial post-Digital
Switchover (DSO) configuration.

Prior
to DSO, all UHF services were provided entirely from the aerial
system within the main cylinder at the top, with no additional panels
serving the pre-switchover digital multiplexes as generally
seen elsewhere.

For DSO,
a supporting cage was added around the mast just below the main
cylinder platform near the top, on which was mounted a reserve UHF
system of four-tier panels on three sides directed towards
the south-west, south and south-east. On the opposing side
of the cage, a single UHF panel directed towards the north-west
was also installed.

At
this stage, the main service was seemingly to continue from an
aerial system within the original analogue cylinder.

Above:
Initial post-DSO from the south-east.

Above:
Initial post-DSO from the north.

The
next set of images show the new six-tier main UHF aerial that was
eventually installed in 2012, almost three years after Digital Switchover.

These
first four images were taken from the south-east. Note how
the top panels on the reserve four-tier system are angled slightly
upwards.

The
next four images show from various viewpoints the post-2012 UHF
aerial configuration towards the north-west.

As
per the four-tier reserve system, the new main UHF aerial consists
of three sides that beam across the southerly directions, whilst
the side facing north-west towards the sea and Northern Ireland
is entirely blank, the space being used for the engineers ladder
that would normally be mounted off-side.

The
single panel facing north-west is the only source of UHF output
in that direction.

The
absence of panels on the sea-facing sides is also a characteristic
of the new main antenna at Dover.

UHF
SUMMARY IMAGES

South-side

2007
- Pre-DSO

2009 - Initial
post-DSO

2012 - Permanent
post-DSO

(GRP
cylinder only)

(GRP
cylinder retained and four-tier reserve panels added)

(GRP
cylinder replaced with new six-tier three-sided aerial)

North-side

2009 - Initial
post-DSO

2012 - Permanent
post-DSO

(GRP
cylinder with single panel on the north-west face)

(New
six-tier main aerial with blank north face)

The
remaining images below continue downwards from the four-tier UHF
reserve system, with the BBC FM radio (Band II) system immediately
below, followed by DAB (Band III) below that.

Like
the main UHF installation, the north facing side of the Band II
system is also devoid of aerials, as shown in the first two images.